COPERNIC和FORWARD关于燃料棒包壳内表面温度的计算结果对比如图 1所示。在整个寿期中两个软件计算得到的包壳内表面温度是基本一致的。在寿期初，对于包壳内表面温度，COPERNIC的计算值约为374℃，而FORWARD的计算值约为376℃，相差2℃。随着燃耗的加深，两者的计算结果基本保持一致，从而验证了开发程序关于包壳内表面温度计算的合理性。

The comparison of COPERNIC and FORWARD calculation results on the inner surface temperature of fuel rod cladding is shown in Figure 1. The inner surface temperature of the cladding calculated by the two softwares is basically consistent throughout the service life. At the beginning of the service life, for the temperature of the inner surface of the cladding, COPERNIC's calculated value is about 374 ℃, while FORWARD's calculated value is about 376 ℃, with a difference of 2 ℃. With the deepening of fuel consumption, the calculation results of the two are basically consistent, which verifies the rationality of the developed program for calculating the temperature of the inner surface of the cladding.